Codec Landscape

Quality vs Bitrate

The figure below illustrates the quality of various codecs as a function of the bitrate. It attempts to summarize
results from a collection of listening tests and (when no data exists) show anecdotal evidence. It is overall fairly
representative, but attempting to extract any exact value at a particular bitrate is certainly not recommended.

Bitrate/Latency Comparison

Listening Tests

Several tests were conducted on Opus, but only the ones conducted on the final bit-stream are listed below.
Although these should give a good idea of the quality of Opus at the time of its standardization (and 1.0 release),
we are hoping that newer and more advanced encoders will reach even better quality.